/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraNode.h
Route input parameter map to output parameter map if it exists. Note that before calling this function, the input pins should have been visited already.
virtual void RouteParameterMapAroundMe ( [FNiagaraParameterMapHistoryBuilder](API\Plugins\NiagaraEditor\FNiagaraParameterMapHistoryBuild-) & OutHistory, bool bRecursive ) const